[mhink]

> My only issue with TypeScript is its strange design with regard to interface and types. Those are pretty fundamental concepts and they're absolutely similar. I don't understand this design and I think that only one thing should have left, but may be I'm wrong about it.

I feel the same way. IIRC, earlier versions of Typescript were much more clearly influenced by .NET and other Microsoft idioms, and there were a few features that didn't seem to make much sense coming from the Javascript side of things. I also had a buddy of mine that's a Java developer be very confused about how they were supposed to work.

> Also I think that TypeScript documentation would benefit from more examples with hard concepts, I didn't fully understand its advanced generics concepts. But that's not a big thing and probably more on me.

Absolutely agree on this, although things are getting better. For awhile it seemed like the only documentation for more advanced features was the main website's blog posts and release notes.